You are right, the things that whould be important are not issues presented so far but the attitude in which it is presented, as with any subject, the more someone is sure they the way that they think is the absolute, the more that they are intolerant of others.
It is more important to work in the spirit of truth, than forcing truth down someone's throat verablly or otherwise. Truth does not need defending. She has an advocate bigger than any of us. He will defend the truth far better than any of us can.
Flavors of the believers has become more bountiful than Baskin Robbin's choices. There are basic foundations that all followers should abide by, walking in the spirit of love, speaking truth without compromise, standing strong on the Word of God over any traditions, and praying without ceasing, ever giving ear to the Holy Spirit whisperings. No one is on the same page of learning and walking in the spirit of truth and righteousness. The Lord is leading and guiding everyone for their own walk with the Lord. They will also be judged by the Lord for their obedience and not by the what the Lord has taught someone else in truth. We are all here to be witnesses of His truth. For His truth has His signature upon it and we are to gather them up like fine rare gems. God never promised that they would only come from one man or one institution. He did however, promise that they would come from Him.
Messianics are a gathering here in the last days, that seeks to find the roots of this faith, some have gone to the days before the gentiles called them Christians. Messianics come in all favors usually manifesting some of the understanding from which they have gathered in their spiritual walks. Some of this will be excess baggage that the Lord will work in their hearts to let go of. Some of it will shine forth as gold and be shared with others as a witness of a wonderful find, like a pearl of great price. So while you may point and find flaws, it doesn't change the heart of the movement. A movement grown first out of a Rabbi's understanding of the Messiah, and the return to hebrew roots. Many gentiles rejoiced and have been grafted into this hebrew root faith. They may have brought what they had with them, but the spirit of rejoicing in the return to Jerusalem, the return to foundation of faith, the return to texts in their original setting, make this movement an exciting adventure in the truths in their proper setting.
We are all learning, and we are all wanting to be prepared to meet the Lord. We know that in the summary of all faiths is the personal relationship with God which is the true key that unlocks the mystery of godliness. I would not want you to trip and fall because of some term or definition that didn't work with your theology, I pray that you continue to grow closer to the Lord, have great inspirations as you read His Word, the courage to walk alone if necessary to obey the Lord, and the heart of love for your fellow man that the Lord has. May you be given the gift of tolerance, long suffering, and most of all patience.